Evaluate
\frac{4\left(15m-2n\right)^{2}}{25}
Expand
-\frac{48mn}{5}+\frac{16n^{2}}{25}+36m^{2}
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36m^{2}-\frac{48}{5}mn+\frac{16}{25}n^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(6m-\frac{4}{5}n\right)^{2}.
36m^{2}-\frac{48}{5}mn+\frac{16}{25}n^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(6m-\frac{4}{5}n\right)^{2}.
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